(57) An image editing apparatus (Fig.1) comprises key frame information input means (101) for inputting key frame information (102) Comprising time on an image sequence and other information; key frame information storage means (103) for storing the key frame information (102); first interpolation control point calculating means (105) for receiving the key frame information (104) output from the key frame information storage means (103), and calculating first interpolation control points used for curve interpolation, by a first calculation method; key frame shape decision means (109) for receiving the key frame information (108) output from the key frame information storage means (103), deciding the shape of a key frame, and outputting key frame shape information (110); second interpolation control point calculating means (111) for receiving the key frame information (108) output from the key frame information storage unit (103) and key frame shape information (110) output from the key frame shape decision means (109), and calculating second interpolation control points by a second calculation method different from the first calculation method when the key frame shape is 'end point' or 'mountain/valley point'; timing generating means (113) for generating timing information of image output; curve interpolation means (107) for receiving the first interpolation control points (106) output from the first interpolation control point calculating means (105), second interpolation control points (112) output from the second interpolation control point calculating means (111), and the timing information (114) output from the timing generating means (113), performing curve interpolation between key frames, and outputting image control information (118); storage means (116) for receiving the timing information (115) output from the timing generating means (113), and outputting an image (117) at the input timing; and image reproducing means (119) for receiving the image (117) output from the storage means (116) and the image control information (118) output from the curve interpolation means (107), and outputting the image (120) to a display unit (121). Therefore, an image effect that accelerates the motion of image at the starting key frame and brakes the motion in the vicinity of the end key frame is easily obtained without adding key frames manually, resulting in a beautiful image that fits the visual characteristics of human beings.